Metal-catalyzed reactions in organic chemistry have received increasing attention due to their efficiency and selectivity. To improve limitations of monometallic reaction systems including catalyst deactivation and requirement of base in some metal-catalyzed reactions, a bimetallic system is considered. Bimetallic systems can often provide useful means to overcome many drawbacks, combining the properties involved in the two individual metals. The synergistic effect of bimetallic system has been reported for divergent applications. Hereupon, we report on the preparation of AuPd-Fe₃O₄ bimetallic nanoparticles by a simple and fast synthetic route and the application of the nanoparticles toward practical synthesis of mono N-alkyl amines using tandem reduction of nitroarenes and reductive amination with aldehydes. Thus, the new catalyst system could offer a very sustainable, environment-friendly tool for potential industrial applications in the reductive amination reaction of nitro compounds.